The device belongs to an IC card reader-writer which is used for connecting a computer. The device is composed of a main controller, a communication interface circuit, a converter, a power supply, a power supply monitor and a socket connected with the computer and an IC card, wherein, the main controller is taken as a core which is connected with the computer through the interface circuit and the converter the readout and the input of the data of the IC card are switched by a converting circuit, and the data are serially inputted or outputted to the computer through the interface circuit. The utility model has simple structure, the controller CPU is taken as the core to collect various data, and has the advantages of high speed and good versatility and is the advanced IC card reader-writer.